1. Introduction

Welcome to Sudoku ("the App"), developed by Puzzle Pixel Studio ("we", "us", or "our"). This Privacy Policy explains how we handle information when you use our App. We are committed to protecting your privacy and being transparent about our practices.

By using the App, you agree to the practices described in this Privacy Policy.

2. Information We Do Not Collect

We designed this App with privacy in mind. We do not collect, store, or process any of the following:

Personal identification information (name, email address, phone number)
Account or registration data — no account is required to use the App
Location data
Contact list or device contacts
Photos, camera, or microphone data
Any data that could personally identify you

3. Advertising — Google AdMob

The App uses Google AdMob to display banner advertisements. AdMob may collect and use certain information automatically to serve relevant ads. This is handled entirely by Google and is governed by Google's own Privacy Policy.

What AdMob May Collect

Google AdMob may automatically collect the following information on our behalf:

Advertising ID (a resettable, anonymous device identifier)
IP address (used to determine approximate location for ad targeting)
Device type, operating system, and language settings
App interaction data (e.g. ad impressions and clicks)
Approximate location derived from IP address

How to Opt Out of Personalised Ads

You can reset your Advertising ID or opt out of personalised advertising at any time by going to:

Android: Settings → Google → Ads → Delete advertising ID or Opt out of Ads Personalisation

For more information about how Google uses data in advertising, please visit:

https://policies.google.com/technologies/ads

4. Push Notifications

The App may send you push notifications, for example to remind you to play or to share updates. Notifications are delivered using Firebase Cloud Messaging (FCM), a service provided by Google.

What FCM Uses

A device token (an anonymous identifier) to deliver notifications to your device
This token is not linked to any personal information and cannot identify you

How to Manage Notifications

You can enable or disable push notifications at any time through your device settings:

Android: Settings → Apps → Sudoku → Notifications → Toggle on or off

Disabling notifications does not affect your ability to use the App.

5. Third-Party Services

The App integrates the following third-party services. Each service operates under its own Privacy Policy, which we encourage you to review:

Google AdMob — https://policies.google.com/privacy
Firebase Cloud Messaging (FCM) — https://firebase.google.com/support/privacy

We are not responsible for the privacy practices of these third-party services. Their data collection and use is governed solely by their own policies.

6. Children's Privacy

The App is not directed at children under the age of 13. We do not knowingly collect any personal information from children. If you are a parent or guardian and believe your child has provided personal data to us, please contact us so we can take appropriate action.

7. Data Security

Since the App does not collect personal data, there is minimal security risk to your personal information. Any data handled by third-party services (AdMob and FCM) is subject to their respective security practices and policies.

8. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any changes will be posted within the App and will be effective as of the updated date shown at the top of this document. We encourage you to review this policy periodically.

Continued use of the App after any changes constitutes your acceptance of the revised Privacy Policy.

9. Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at:

Puzzle Pixel Studio

Website: https://www.ppixel.org/home

GitHub: https://github.com/rachelmark46

This privacy policy was last updated on April 6, 2026.